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Inner Ring Dimensions Pipes Under 24"
    











Part Numbers


Standard inside diameter of inner rings for SWG

Nom
Pipe Size
Pressure Class
150
300
400
600
900
1500
2500
1/2
0.56
0.56
0.56
0.56
0.56
0.56
0.56
3/4
0.81
0.81
0.81
0.81
0.81
0.81
0.81
1
1.06
1.06
1.06
1.06
1.06
1.06
1.06
1-1/4
1.50
1.50
1.50
1.50
1.31
1.31
1.31
1-1/2
1.75
1.75
1.75
1.75
1.63
1.63
1.63
2
2.19
2.19
2.19
2.19
2.06
2.06
2.06
2-1/2
2.62
2.62
2.62
2.62
2.50
2.50
2.50
3
3.19
3.19
3.19
3.19
3.10
3.10
3.10
4
4.19
4.19
4.04
4.04
4.04
3.85
3.85
5
5.19
5.19
5.05
5.05
5.05
4.90
4.90
6
6.19
6.19
6.10
6.10
6.10
5.80
5.80
8
8.50
8.50
8.10
8.10
7.75
7.75
7.75
10
10.56
10.56
10.05
10.05
9.69
9.69
9.69
12
12.50
12.50
12.10
12.10
11.50
11.50
11.50
14
13.75
13.75
13.50
13.50
12.63
12.63
-
16
15.75
15.75
15.35
15.35
14.75
14.50
-
18
17.69
17.69
17.25
17.25
16.75
16.75
-
20
19.69
19.69
19.25
19.25
19.00
18.75
-
24
23.75
23.75
23.25
23.25
23.25
22.75
-


Series B Flanges 26" and Over

Nom
Pipe Size
Class 75
  
Class 150
    
Class 300
  
Sealing Element
Sealing Element
Sealing Element
I.D.
O.D.
Centering Ring O.D.
Inner Ring I.D.
I.D.
O.D.
Centering Ring O.D.
Inner Ring I.D.
I.D.
O.D.
Centering Ring O.D.
26
26-1/4
27
27-7/8
25-3/4
26-1/2
27-1/2
28-9/16
25-3/4
26-1/2
28
30-3/8
28
28-1/4
29-1/8
29-7/8
27-3/4
28-1/2
29-1/2
30-9/16
27-3/4
28-1/2
30
32-1/2
30
30-1/4
31-1/8
31-7/8
29-3/4
30-1/2
31-1/2
32-9/16
29-3/4
30-1/2
32
34-7/8
32
32-1/4
33-1/8
33-7/8
31-3/4
32-1/2
33-1/2
34-11/16
31-3/4
32-1/2
34
37
34
34-1/4
35-1/8
35-7/8
33-3/4
34-1/2
35-3/4
36-13/16
33-3/4
34-1/2
36
39-1/8
36
36-1/4
37-1/4
38-5/16
35-3/4
36-1/2
37-3/4
38-7/8
35-3/4
36-1/2
38
41-1/4
38
-
-
-
37-3/4
38-3/8
39-3/4
41-1/8
38-1/4
39-3/4
41-1/4
43-1/4
40
-
-
-
39-3/4
40-1/4
41-7/8
43-1/8
40-1/4
41-3/4
43-1/4
45-1/4
42
42-1/4
43-1/4
44-5/16
41-3/4
42-1/2
43-7/8
45-1/8
42-3/4
43-3/4
45-1/4
47-1/4
44
-
-
-
43-3/4
44-1/4
45-7/8
47-1/8
44-1/4
45-3/4
47-1/4
49-1/4
46
-
-
-
45-3/4
46-1/2
48-3/16
49-7/16
46-3/8
47-7/8
49-3/8
51-7/8
48
48- 3/8
49- 1/2
50- 1/2
47-3/4
48-1/2
50
51-7/16
48-1/2
49-3/4
51-5/8
53-7/8
50
-
-
-
49-3/4
50-1/2
52-3/16
53-7/16
49-7/8
51-7/8
53-3/8
55-7/8
52
-
-
-
51-3/4
52-1/2
54-3/16
55-7/16
51-7/8
53-7/8
55-3/8
57-7/8
54
54-3/8
55-5/8
56-5/8
53-3/4
54-1/2
56
57-5/8
53-3/4
55-1/4
57-1/4
60-1/4
56
-
-
-
56
56-7/8
58-3/16
59-5/8
56-1/4
58-1/4
60
62-3/4
58
-
-
-
58-3/16
59-1/16
60-3/16
62-3/16
58-7/16
60-7/16
61-15/16
65-3/16
60
60-1/2
61-3/4
62-7/8
60-7/16
61-5/16
62-7/16
64-3/16
61-5/16
62-9/16
64-3/16
67-3/16


Nom
Pipe Size
  
Class 400
  
Class 600
    
Class 900
  
Sealing Element
Sealing Element
Sealing Element
Inner Ring I.D.
I.D.
O.D.
Centering Ring O.D.
Inner Ring I.D.
I.D.
O.D.
Centering Ring O.D.
Inner Ring I.D.
I.D.
O.D.
Centering Ring O.D.
26
25-3/4
26-1/4
27-1/2
29-3/8
25-3/8
26-1/8
28-1/8
30-1/8
26-1/4
27-1/4
29-1/2
33
28
27-5/8
28-1/8
29-1/2
31-1/2
27
27-3/4
29-3/4
32-1/4
28-1/4
29-1/4
31-1/2
35-1/2
30
29-5/8
30-1/8
31-3/4
33-3/4
29-5/8
30-5/8
32-5/8
34-5/8
30-3/4
31-3/4
33-3/4
37-3/4
32
31-1/2
32
33-7/8
35-7/8
31-1/4
32-3/4
34-3/4
36-3/4
33
34
36
40
34
33-1/2
34-1/8
35-7/8
37-7/8
33-1/2
35
37
39-1/4
35-1/4
36-1/4
38-1/4
42-1/4
36
35-3/8
36-1/8
38
40-1/4
35-1/2
37
39
41-1/4
36-1/4
37-1/4
39-1/4
44-1/4
38
37-1/2
38-1/4
40-1/4
42-1/4
37-1/2
39
41
43-1/2
39-3/4
40-3/4
42-3/4
47-1/4
40
39-3/8
40-3/8
42-3/8
44-3/8
39-3/4
41-1/4
43-1/4
45-1/2
41-3/4
43-1/4
45-1/4
49-1/4
42
41-3/8
42-3/8
44-3/8
46-3/8
42
43-1/2
45-1/2
48
43-3/4
45-1/4
47-1/4
51-1/4
44
43-1/2
44-1/2
46-1/2
48-1/2
43-3/4
45-3/4
47-3/4
50
45-1/2
47-1/2
49-1/2
53-7/8
46
46
47
49
50-3/4
45-3/4
47-3/4
49-3/4
52-1/4
48
50
52
56-1/2
48
47-1/2
49
51
53
48
50
52
54-3/4
50
52
54
58-1/2
50
49-1/2
51
53
55-1/4
50
52
54
57
-
-
-
-
52
51-1/2
53
55
57-1/4
52
54
56
59
-
-
-
-
54
53-1/4
55-1/4
57-1/4
59-3/8
54-1/4
56-1/4
58-1/4
61-1/4
-
-
-
-
56
55-1/4
57-1/4
59-1/4
61-3/4
56-1/4
58-1/4
60-1/4
63-1/2
-
-
-
-
58
57-1/4
59-3/4
61-1/4
63-3/4
58
60-1/2
62-1/2
65-1/2
-
-
-
-
60
59-3/4
61-3/4
63-3/4
66-1/4
60-1/4
62-3/4
64-3/4
68-1/4
-
-
-
-


Series A Flanges 22" and Over

Nom
Pipe Size
  
Class 150
  
Class 300
    
Class 400
  
Sealing Element
Sealing Element
Sealing Element
Inner Ring I.D.
I.D.
O.D.
Centering Ring O.D.
Inner Ring I.D.
I.D.
O.D.
Centering Ring O.D.
Inner Ring I.D.
I.D.
O.D.
Centering Ring O.D.
22
-
22-3/4
24
26
-
22-3/4
24-3/4
27-3/4
-
22-3/4
24-3/4
27-5/8
26
25-3/4
26-1/2
27-3/4
30-1/2
25-3/4
27
29
32-7/8
26
27
29
32-3/4
28
27-3/4
28-1/2
29-3/4
32-3/4
27-3/4
29
31
35-3/8
28
29
31
35-1/8
30
29-3/4
30-1/2
31-3/4
34-3/4
29-3/4
31-1/4
33-1/4
37-1/2
29-3/4
31-1/4
33-1/4
37-1/4
32
31-3/4
32-1/2
33-7/8
37
31-3/4
33-1/2
35-1/2
39-5/8
32
33-1/2
35-1/2
39-1/2
34
33-3/4
34-1/2
35-7/8
39
33-3/4
35-1/2
37-1/2
41-5/8
34
35-1/2
37-1/2
41-1/2
36
35-3/4
36-1/2
38-1/8
41-1/4
35-3/4
37-5/8
39-5/8
44
36-1/8
37-5/8
39-5/8
44
38
37-3/4
38-1/2
40-1/8
43-3/4
37-1/2
38-1/2
40
41-1/2
37-1/2
38-1/4
40-1/4
42-1/4
40
39-3/4
40-1/2
42-1/8
45-3/4
39-1/2
40-1/4
42-1/8
43-7/8
39-3/8
40-3/8
42-3/8
44-3/8
42
41-3/4
42-1/2
44-1/4
48
41-1/2
42-1/4
44-1/8
45-7/8
41-3/8
42-3/8
44-3/8
46-3/8
44
43-3/4
44-1/2
46-3/8
50-1/4
43-1/2
44-1/2
46-1/2
48
43-1/2
44-1/2
46-1/2
48-1/2
46
45-3/4
46-1/2
48-3/8
52-1/4
45-3/8
46-3/8
48-3/8
50-1/8
46
47
49
50-3/4
48
47-3/4
48-1/2
50-3/8
54-1/2
47-5/8
48-5/8
50-5/8
52-1/8
47-1/2
49
51
53
50
49-3/4
50-1/2
52-1/2
56-1/2
49
51
53
54-1/4
49-1/2
51
53
55 1/
52
51-3/4
52-1/2
54-1/2
58-3/8
52
53
55
56-1/4
51-1/2
53
55
57-1/4
54
53-1/2
54-1/2
56-1/2
61
53-1/4
55-1/4
57-1/4
58-3/4
53-1/4
55-1/4
57-1/4
59-3/4
56
55-1/2
56-1/2
58-1/2
63-1/4
55-1/4
57-1/4
59-1/4
60-3/4
55-1/4
57-1/4
59-1/4
61-3/4
58
57-1/2
58-1/2
60-1/2
65-1/2
57
59-1/2
61-1/2
62-3/4
57-1/4
59-1/4
61-1/4
63-3/4
60
59-1/2
60-1/2
62-1/2
67-1/2
60
61-1/2
63-1/2
64-3/4
59-3/4
61-3/4
63-3/4
66-1/4



Nom
Pipe Size
  
Class 600
  
Class 900
  
Sealing Element
Sealing Element
Inner Ring I.D.
I.D.
O.D.
Centering Ring O.D.
Inner Ring I.D.
I.D.
O.D.
Centering Ring O.D.
22
-
22-3/4
24-3/4
28-7/8
-
-
-
-
26
25-1/2
27
29
34-1/8
26
27
29
34-3/4
28
27-1/2
29
31
36
28
29
31
37-1/4
30
29-3/4
31-1/4
33-1/4
38 1/=
30-1/4
31-1/4
33-1/4
39-3/4
32
32
33-1/2
35-1/2
40-1/4
32
33-1/2
35-1/2
42-1/4
34
34
35-1/2
37-1/2
42-1/4
34
35-1/2
37-1/2
44-3/4
36
36-1/8
37-5/8
39-5/8
44-1/2
36-1/4
37-3/4
39-3/4
47-1/4
38
37-1/2
39
41
43-1/2
39-3/4
40-3/4
42-3/4
47-1/4
40
39-3/4
41-1/4
43-1/4
45-1/2
41-3/4
43-1/4
45-1/4
49-1/4
42
42
43-1/2
45-1/2
48
43-3/4
45-1/4
47-1/2
51-1/4
44
43-3/4
45-3/4
47-3/4
50
45-1/2
47-1/2
49-1/2
53-7/8
46
45-3/4
47-3/4
49-3/4
52-1/4
48
50
52
56-1/2
48
48
50
52
54-3/4
50
52
54
58-1/2
50
50
52
54
57
-
-
-
-
52
52
54
56
59
-
-
-
-
54
54-1/4
56-1/4
58-1/4
61 1/4
-
-
-
-
56
56-1/4
58-1/4
60-1/4
63-1/2
-
-
-
-
58
58
60-1/2
62-1/2
65-1/2
-
-
-
-
60
60-1/4
62-3/4
64-3/4
68-1/4
-
-
-
-